EV Charging Authentication Using Battery Deterioration Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for detecting unauthorized use and deterioration of electric energy storage devices in electric vehicles fail to maintain the power availability at or above a given level, due to tampering with usage history and distribution of deteriorated batteries.
Innovation Solution
A charging station and battery management system that perform mutual authentication with electric energy storage devices, obtain and store a degree of deterioration in a tamper-resistant memory, and prevent charging when the deterioration exceeds a predetermined threshold, ensuring only non-deteriorated batteries are used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mutual authentication and deterioration detection are implemented, then battery safety and reliability are improved, but system complexity and cost increase
Solution Approach 1:
The patent implements preliminary action by performing mutual authentication between the charging station and battery pack before charging begins, and by detecting the degree of deterioration in advance through authentication data. This prevents deteriorated batteries from being charged, thereby maintaining battery safety without requiring complex continuous monitoring systems during charging operations.
Solution Approach 2:
The patent uses authentication data as an intermediary to indirectly assess battery deterioration. Instead of directly measuring complex battery health parameters, the system uses authentication information (which reflects battery usage history and status) as a mediator to determine the degree of deterioration. This simplifies the detection mechanism while maintaining reliability.
2Reliability
If deteriorated batteries are prevented from charging, then power availability is maintained, but charging productivity decreases
Solution Approach 1:
The patent implements feedback by continuously monitoring authentication data to assess battery deterioration status. When a battery's deterioration exceeds the threshold, the system provides feedback by preventing further charging and notifying relevant parties. This ensures power availability is maintained while minimizing impact on productivity by only blocking deteriorated batteries rather than all batteries.
Solution Approach 2:
The patent uses parameter changes by establishing a threshold value for the degree of deterioration. The charging decision is based on comparing the assessed deterioration level against this parameter threshold. This simple parameter-based approach maintains power availability by blocking only deteriorated batteries while allowing healthy batteries to charge normally, thus preserving charging productivity.
3Measurement precision
If authentication data is used to assess deterioration, then detection precision is improved, but information security requirements increase
Solution Approach 1:
The patent uses authentication data as an intermediary that already exists in the system for security purposes. By repurposing this existing data to assess battery deterioration, the system achieves precise detection without requiring additional sensitive information collection or transmission, thereby minimizing information security risks.
Solution Approach 2:
The patent implements self-service by using authentication data that is already generated and held by the battery pack for its own identification and security purposes. The battery pack itself provides the authentication data that reveals its deterioration status, eliminating the need for separate data collection mechanisms and reducing information security requirements.
Data Source
AI summary
A charging station charges an electric energy storage device, and includes: a battery authenticator that performs mutual authentication with the electric energy storage device connected for charging; a communicator that obtains, from the electric energy storage device whose validity is confirmed in the mutual authentication, a degree of deterioration related to deterioration of the electric energy storage device; a recorder that stores the degree of deterioration obtained by the communicator and that is tamper-resistant; and a controller that does not charge the electric energy storage device when the degree of deterioration of the electric energy storage device indicates that the deterioration is advanced beyond a predetermined threshold value.